Direct-X diagnostics tool (DXDIAG) may report an unexpected value for the display adapter memory on a system with 1GB or greater of Video memory, and 4GB or greater of system memory (RAM).
LastUpdate : Wed, 04 Feb 2015
Answer
Microsoft is working to resolve this in future releases. Please refer to the Microsoft KB article 2026022 (http://support.microsoft.com/kb/2026022) .